CN103607138B - Self-powered type nonlinear piezoelectric vibration energy extraction circuit - Google Patents
Self-powered type nonlinear piezoelectric vibration energy extraction circuit Download PDFInfo
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Abstract
The invention discloses a self-powered type nonlinear piezoelectric vibration energy extraction circuit. The circuit comprises a nonlinear energy extraction circuit module, an extremum detection circuit module and a power supply circuit module, wherein the nonlinear energy extraction circuit module is used to collect charges of a piezoelectric material, convert the charges into a direct current and output to an external load so as to carry out power supply, wherein the charges are generated because of strain; the extremum detection circuit module is used to detect a charge extremum on a piezoelectric material surface and emit a control signal so as to control on and off of the nonlinear energy extraction circuit; the power supply circuit module is used to provide power for low-power electronic devices in a nonlinear energy collection circuit module and the extremum detection circuit module. Compared to a standard circuit, by using the nonlinear energy extraction circuit provided in the invention, recovery power is greatly increased and a high output voltage is possessed; various kinds of power supply management modes can be matched; a wide application prospect is possessed for power supply of a wireless network sensing node.
Description
Technical field
The present invention relates to a kind of circuit extracting vibrational energy, more particularly, to one kind utilize piezoelectric to ambient vibration energy
The self-powered circuit that amount is extracted.
Background technology
At present, the electronic equipment of wireless system and Micro Energy Lose finds broad application in daily life, with Micro Energy Lose
The development further of electronic devices and components, wireless network formula sensor-based system is also widely used in various monitoring systems, such as to large-scale
The buildings such as plant equipment, rapid, field ecological environment, road, bridge, reservoir are monitored, and raising sets
Standby operational reliability, reduces maintenance cost.However, most wireless sensor nodes are still powered using battery at present, due to
Battery service life is limited, leads to wireless sensing node to be not easy to install and need periodic replacement battery, increases to a great extent
Add equipment operation maintenance expense, and substantial amounts of use battery, also bring very big pollution to environment.Therefore, develop one kind
New power supply becomes the effective scheme solving this problem and is gradually brought into schedule.In addition, radio sensing network is low
Power consumptionization drives to the research developing new energy resource system further, because the power consumption of node is extremely low, exists in extraneous bad border
Polytype energy meets the energy ezpenditure of node.
The energy of the various ways such as solar energy, thermal gradient energy, vibrational energy is there is in natural environment, but solar energy and the temperature difference
The function technology of energy is subject to the restriction of natural environment to be difficult to extensively apply, and obtains energy from mechanical oscillation and be proved to be to cut
Real feasible.At present vibrational energy is changed into electric energy and typically adopt three kinds of methods：Electromagnetic type, electrostatic and piezoelectric type.Due to pressure
The power output of electric-type energy-recuperation system is larger, and small volume, it is easy to the miniaturization of device and integrated, is not produced to electronic device
Raw electromagnetic interference, therefore many research institutions and scholars expand research to piezoelectric type energy recovery system both at home and abroad.
Research for piezoelectric type energy recovery system is concentrated mainly on three aspects：Material, structure and interface circuit.Pressure
Electric material mainly has piezoelectric monocrystal, piezoelectric ceramics, Kynoar etc..The design of energy regenerating structure includes individual layer, many laminations
Electric flux retracting device, piezoelectric stack etc..And interface circuit aspect, mainly there are multiple typical case's application interface circuit at present：Its
In interface circuit classical be a diode full-wave bridge and a filter capacitor composition, but this interface
Not only regenerative power is low for circuit, and the power reclaiming affected by load impedance very big.Carry for solving this and asking.Many
The nonlinear energy of switchtype extracts circuit and is proposed out.Synchro switch inductance is mainly had to reclaim（SSHI）Circuit, synchronization
Charge-extraction（SECE）Circuit, Optimization-type synchronization charge-extraction（OSECE）Circuit, double synchro switch inductance reclaim（DSSH）Electricity
Road, the double synchro switch inductance of enhancement mode reclaim（ESSH）Circuit etc..The circuit of these switchtypes is all to be opened by controlling simulation
The break-make closed, when charge accumulated is to maximum on the piezoelectric element, makes energy acquisition circuit turn on, disposably all carries electric charge
Take to accumulator, substantially increase the efficiency of energy regenerating.But SSHI circuit regenerative power is still subject to the shadow of load impedance
Sound is larger, and SECE, OSECE, DSSH, ESSH circuit solves this problem well, its regenerative power and unrelated, the energy of load
Meet the needs of energy regenerating practical application well.But SECE circuit requirement switch-closed time in microsecond rank and is wanted
Ask very accurate, be difficult to realize in actual applications not against extraneous power supply and work independently, OSECE circuit is in SECE circuit
On the basis of, optimize its switch-control strategy so that the control of analog switch becomes simple in circuit, and give low
The self-powered scheme of power consumption, makes SECE circuit become simple, efficient, independent energy collecting system.DSSH circuit is in very great Cheng
Circuit regenerative power is improve on degree, but the complicated on-off control system of this circuit makes it in extraneous offer power supply
Just enable in DSP control system.The proposition of ESSH circuit solves DSSH this key technology difficulty of circuit realiration self-powered,
This energy recovering circuit is made to have stepped a crucial step apart from practical application.But the complicated electric power system of ESSH circuit and the energy
Management system make this circuit final output voltage can only be maintained at one relatively low within the scope of.
Content of the invention
Technical problem
The technical problem to be solved in the present invention is that the piezoelectric vibration energy providing a kind of self-powered extracts circuit.This circuit
Can high efficiente callback ambient vibration energy, overcome conventional energy collection circuit power output with load change and change lack
Point.Meanwhile, the powering mode of the conventional circuit of this circuit optimization is so that this circuit can be powered not against extraneous power supply and independent
Work, and this circuit final output power and output voltage are also further enhanced.Can be widely used for wireless sensor network
Network node and the power supply of other Micro Energy Lose electronic devices.
Technical scheme
In order to solve above-mentioned technical problem, the non-linear piezoelectric vibration energy of self-powered of the present invention extracts circuit bag
Include：
For collecting piezoelectric due to straining the electric charge producing and being converted into direct current electricity output to extraneous load confession
The nonlinear energy of electricity extracts circuit module；
For detecting the electric charge extreme value of piezoelectric material surface, and send control signal to control nonlinear energy to extract circuit
Break-make extremum extracting circuit module；
With the confession powered to low-power electronic devices in nonlinear energy collecting circuit module and extremum extracting circuit module
Electric circuit module.
Wherein, described nonlinear energy extract circuit be used for collecting be pasted on the piezoelectric of extraneous vibration body structure surface by
The electric charge producing in strain, and it is converted into direct current electricity output to extraneous load supplying so that whole energy collecting system becomes
For being not required to rely on the autonomous working system of extraneous power supply, meet general wireless sensor network and the power supply of Micro Energy Lose electronic equipment
Require.
Further, described nonlinear energy extracts circuit module and includes the first piezoelectric element, and first, second, the
Three analog switches, the three, the four, the five, the 6th diodes, first, second storage capacitor, threshold value control circuit, inductance and liter
Pressure/step-down controller, wherein, the first described piezoelectric element first end is connected with the first analog switch first end by inductance,
First analog switch the second end is connected between the 3rd diode cathode and the 4th diode cathode；First piezoelectric element the second end
It is connected between the 5th diode cathode and the 6th diode cathode；Described first storage capacitor first end is born with the 5th diode
Pole connects, and the second end is connected with the 6th diode cathode；First storage capacitor first end passes through the second analog switch and boosting/fall
The anode of pressure converter former limit connects, and the negative electrode of step-up/down converter former limit is connected with first storage capacitor the second end；Rise
The anode of pressure/step-down controller secondary is connected with the anode of the second storage capacitor by the 7th diode, the negative electrode of secondary and
The negative pole of two storage capacitors is connected；Described threshold value control circuit detects the voltage signal on described first storage capacitor, and to
3rd analog switch sends drive signal, and described threshold value control circuit is realized by the 5th voltage comparator of a low-power consumption；Its
Described in first, second analog switch be respectively used to control described nonlinear energy to extract the break-make of circuit, when described non-linear
During Energy extraction circuit turn-on, electric charge that extractable first piezoelectric element is produced due to ambient vibration and pass through described four whole
Ac voltage rectifier is direct current by stream diode, is stored in the first storage capacitor.Described threshold value control circuit is used for detecting described
Voltage signal on first storage capacitor, when the voltage on the first storage capacitor is higher than certain value, is produced by threshold value control circuit
Give birth to the drive signal for the 3rd analog switch so that energy is turned by described step-up/down converter on the first storage capacitor
Move to the second storage capacitor.Described boosting, step-down controller its essence is the single-ended flyback transformer of a high quality factor,
Including a primary coil and a secondary coil.The positive pole of the anode of its primary coil and the first storage capacitor is connected, former limit
The negative pole of the negative electrode of coil and the first storage capacitor is connected, and the anode of secondary coil passes through the 7th diode and the second storage capacitor
Anode be connected, the negative electrode of secondary coil is connected with the negative pole of the second storage capacitor.External by the voltage on the second storage capacitor
Boundary's load supplying.
Specifically, the first analog switch is made up of the first p-type FET, the colelctor electrode of the first FET and the five or two
The positive pole of pole pipe connects, and the negative pole of the 5th diode is connected with the positive pole of the 3rd diode.The emitting stage of the first FET with
" " end connection.Second analog switch is made up of the second p-type FET, the colelctor electrode and the six or two of the second p-type FET
The anode of pole pipe connects, and the negative pole of the 6th diode is connected with the positive pole of the 4th diode.The transmitting collection of the second FET
With " " end be connected.The positive pole of the first storage capacitor is connected with the negative pole of the three, the 4th diodes, simultaneously first storage capacitor
Positive pole is connected with the input of the 5th voltage comparator, the negative pole of the first storage capacitor with " " end be connected.3rd analog switch
Be made up of the three, the 4th FETs, the 3rd FET is a N-type FET, its transmitting collection with " " hold be connected, base
Pole is connected with the output end of the 5th voltage comparator, and colelctor electrode is connected with the base stage of the 4th p-type FET, the 4th FET
Transmitting collection be connected with the positive pole of the first storage capacitor and the 6th resistance, the negative pole of the 6th resistance and the base stage of the 4th FET
Be connected, the colelctor electrode of the 4th FET is connected with the positive pole of the primary coil of single-ended flyback transformer, primary coil bear
Pole with " " be connected.The positive pole of the secondary coil of single-ended flyback transformer with " " end is connected, negative pole and the 7th diode
Positive pole be connected, the negative pole of the 7th diode is connected with the positive pole of the second storage capacitor, the negative pole of the second storage capacitor with " " phase
Even.Described threshold value control circuit includes the 5th voltage comparator and the seven, the eight, the nine, the ten, the 11st resistance and the 7th electricity
Hold.The positive power input V+ of the 5th voltage comparator is connected with the positive pole of the first storage capacitor, negative sense power input V-
With GND end with " " be connected.The positive pole of the 7th resistance is connected with the REF end of the 5th voltage comparator, negative pole and the 7th electric capacity
Positive pole be connected, the negative pole of the 7th electric capacity with " " hold be connected.The positive pole of the 8th resistance also REF end phase with the 5th voltage comparator
Even, negative pole is connected with HYST end, and the positive pole of the 9th resistance is connected with the HYST end of the 5th voltage comparator, negative pole and ground terminal phase
Even.The positive pole of the tenth resistance is connected with the positive pole of the first storage capacitor, the in-phase input end phase of negative pole and the 5th voltage comparator
Even, the positive pole of the 11st resistance is connected with the in-phase input end of the 5th voltage comparator, negative pole with " " hold and be connected.When threshold value control
Electric circuit inspection processed to the voltage on the first storage capacitor exceed certain value when, send switching drive signal and the 3rd analog switch closed
Close, be stored in the electric energy transfer on the first storage capacitor to the primary coil of single-ended flyback transformer.When the first storage capacitor
On voltage be less than certain value when, control signal is sent by threshold value control circuit the 3rd analog switch is disconnected, be now stored in
Electric energy on flyback transformer primary coil is transferred to the second storage capacitor storage through secondary mutual inductor.
Described extremum extracting circuit module includes the second piezoelectric element, input signal conditioning module, low-pass filtering module
And voltage comparison module, wherein, input signal conditioning module is followed circuit by first, second resistance and first voltage and is formed, low
Pass filtering module is made up of the 3rd adjustable resistance, the 6th electric capacity and the second operational amplifier, and voltage comparison module is by the three, the 4th
Operational amplifier forms；Voltage signal magnitude is nursed one's health by the voltage signal of the second piezoelectric element through described Signal-regulated kinase
Afterwards, then by this signal through described low-pass filtering module, by original signal with the signal through LPF through described voltage ratio
It is compared, to first, second analog switch output control signal compared with module；This extremum extracting module can be with real-time detection piezoelectricity
The electric charge that material surface produces, reaches greatly when piezoelectric material surface voltage is detected（Minimum）During value, extremum extracting circuit divides
Described nonlinear energy Chan Sheng not driven to extract the first/second analog switch closure of circuit so that non-thread performance by voltage signal
Amount extracts circuit turn-on, and collection of energy process starts.When the quantity of electric charge on piezoelectric is less than the voltage on the first storage capacitor
When, nonlinear energy extracts circuit and disconnects, and collection of energy process stops.Specifically, the inverting input of first voltage follower
It is connected with output end, two-way is divided into by the signal that Signal-regulated kinase exports, a road is via low-pass filtering module input the 3rd fortune
Calculate the in-phase input end of amplifier, a road directly inputs the reverse input end of tertiary voltage comparator.Described low-pass filtering module
It is made up of the 3rd adjustable resistance, the 6th electric capacity, the four, the 5th resistance, second voltage operational amplifier.3rd adjustable resistance is just
Pole is connected with the output end of first voltage follower, the adjustable side of the 3rd adjustable resistance and the homophase of second voltage operational amplifier
Input is connected.The positive pole of the 6th electric capacity is connected with the in-phase input end of second voltage operational amplifier, the negative pole of the 6th electric capacity
With " " end be connected.The inverting input of the second operational amplification circuit is connected with the anode of the 4th resistance, the negative terminal of the 4th resistance
With " " be connected, the inverting input of the second operational amplification circuit is via the 5th adjustable resistance and the second operational amplifier simultaneously
Output end is connected.The output end of the second operational amplification circuit is connected with the in-phase input end of tertiary voltage comparator.3rd computing
The output of amplifier is divided into two-way, and a road is connected with the base stage of the first FET, in order to drive the first analog switch, Ling Yilu
It is connected with the inverting input of four-operational amplifier.The in-phase input end of four-operational amplifier with " " end be connected, export
End is connected with the base stage of the second field-effect, in order to drive the second FET.When the voltage on the second piezoelectric element reach minimum
During value, in extremum extracting circuit, the signal of tertiary voltage comparator output drives the first analog switch closure, makes Energy extraction electricity
The first piezoelectric element in road, inductance, the four, the 5th diodes, the first storage capacitor composition LC oscillating circuit, by piezoelectric element
On charge-extraction to the first storage capacitor.When the voltage on the second piezoelectric element reaches maximum, in extremum extracting circuit
The signal of four-operational amplifier output drives the second analog switch closure, make the first piezoelectric element in Energy extraction circuit,
Inductance, the three, the 6th diodes, the first storage capacitor composition LC oscillating circuit, by the charge-extraction on piezoelectric element to first
Storage capacitor.
Described self-powered circuit includes the 3rd piezoelectric element, first, second diode and the three, the four, the 5th electric capacity,
Alternating voltage on described 3rd piezoelectric element through first, second diode halfwave rectifier, then through the three, the four, the 5th
After capacitor low pass ripple, form forward dc voltage in the anode of the 3rd electric capacity, form negative sense in the negative electrode of the 5th electric capacity straight
Stream voltage, to circuit power itself.
The technical scheme of this invention optimizes the switch-control strategy in DSSH circuit, for the control of the 3rd analog switch
System, the 3rd analog switch closure is all extracted by DSSH technology up to the electric charge on the first storage capacitor, and the technical program
Only by the most of charge-extraction on the first storage capacitor, substantially increase Energy extraction density.The technical program is by DSSH
The second inductance replaced with flyback transformer, which ensures that the first storage capacitor and the second storage capacitor " " hold be with
One end it is achieved that the first storage capacitor, the second storage capacitor and load " altogether " are it is ensured that the realization of DSSH self-powered circuit,
Overcome the shortcoming that conventional DSSH circuit just can only enable in the dsp system powered by the external world.
Beneficial effect：
The present invention is had the advantages that based on the self-powered energy recovering circuit of piezoelectric：
（1）Nonlinear energy proposed by the present invention extracts circuit regenerative power comparison with standard circuit and is greatly improved,
And there is very high output voltage, multiple power sources way to manage can be mated, for the power supply tool of wireless network formula sensing node
Have wide practical use.
（2）The regenerative power of this Energy extraction circuit does not change with the change of load impedance, therefore the application of this circuit
It is relatively independent of operation load, in wider load impedance excursion, all can obtain ideal power output, from
And ensure that being powered system runs steadily in the long term.
（3）Electronic component in this inventive technique is realized by micro-power device, and circuit power consumption itself is very low, and electricity
Each Micro Energy Lose electronic device of road provides power supply by the energy that circuit itself is collected for it, and this energy-recuperation system itself can
Quickly, independently, stably work, meet the essential characteristic of energy regenerating actual application environment, for wireless in vibration environment
The power supply of sensing node is with a wide range of applications.
Brief description
Fig. 1 is the system schematic that the non-linear piezoelectric vibration energy of self-powered of the present invention extracts circuit；
Fig. 2 is the schematic diagram that self-powered nonlinear energy extracts circuit module；Wherein, PZT is the first piezoelectric element,
Cint is the first storage capacitor, and Cs is the second storage capacitor, and S1 includes first, second analog switch, and S2 is the 3rd analog switch,
L1 is external inductance, and L2, L3 are primary coil and the secondary coil of flyback transformer, and RL is external load resistance；
Fig. 3 is that the circuit of the embodiment that the non-linear piezoelectric vibration energy of self-powered of the present invention extracts circuit is illustrated
Figure；
Fig. 4 is that the final regenerative power of one embodiment of the invention is defeated with preferred circuit and synchro switch inductance recovery circuit
Go out the comparison schematic diagram of power；
Fig. 5 (a) and（b）Be respectively the present invention circuit in actual applications with preferred circuit phase specific power output and output
With the change of load, its experiment condition is the vibration in cantilever piezoelectric vibrating power-generation structure single mode uniform amplitude to voltage.
Specific embodiment
Below in conjunction with accompanying drawing, technical scheme is further described.
As shown in figure 1, the present embodiment a kind of non-linear piezoelectric vibration energy of self-powered extract circuit include non-linear
Energy extraction and energy storage module, extremum extracting module, self-powered circuit module composition.Wherein, described nonlinear energy carries
Sense circuit module includes the first piezoelectric element PZT1, inductance L1, switch S1（Including first, second analog switch）, switch S2（The
Three analog switches）, charge-extraction circuit module, threshold value control circuit module（The control signal to switch SW2 for the output）, inverse-excitation type
Transformer（Including primary coil L2, secondary coil L3）, accumulator.Described extremum extracting circuit module is included by the second piezoelectricity
Piezoelectric signal sensing unit and extremum extracting circuit that element PZT2 is constituted, being capable of voltage letter on real-time monitoring piezoelectric element
Number, the control signal to switch SW1 for the output.Described self-powered circuit module includes the 3rd piezoelectric element PZT3 and power supply circuits,
This module provides the electric energy that the electronic component in extremum extracting circuit is consumed.
As shown in Figure 2 and Figure 3, nonlinear energy extraction process is divided into first Energy extraction and second energy extraction process.By
It is pasted onto the first piezoelectric element PZT1 on vibrational structure surface, extraneous inductance L1, the three, the four, the five, the 6th commutation diodes
D3, D4, D5, D6, and the first storage capacitor C1 and first, second analog switch Q1, Q2 first Energy extraction module of composition.When
When between the first piezoelectric element PZT1 upper and lower surface, voltage reaches maximum, by second analog switch Q2 close, by PZT1, L1, D3,
D6, C1 composition closure LC electromagnetic viscosimeter loop, after 1/2nd cycles of oscillation of experience, the electric charge transfer of piezoelectric element to the
One storage capacitor C1, the voltage on the first piezoelectric element is reverse, due to the 3rd diode D3, the 6th diode before closing with switch
The presence of D6, now the disconnection of this LC loop, completes the single charge-extraction of Energy extraction circuit.Equally work as on piezoelectric element
When voltage reaches minimum between lower surface, the first analog switch Q1 is closed, closure LC electricity is formed by PZT1, L1, D4, D5, C1
Magnetic oscillation loop, the electric charge transfer of piezoelectric element is to the first storage capacitor C1.Wherein first, second analog switch is by p-type
FET realize, for first, second analog switch control signal by extremum extracting circuit output.When every time by the first pressure
Electric device, to the energy transfer of the first storage capacitor, begins to second energy extraction process.Second energy extraction module
Including the 3rd analog switch Q3, the 6th resistance R6, threshold value control circuit（Including hysteresis voltage comparator U5, resistance R7, R8, R9,
R10, R11, electric capacity C7）, single-ended flyback transformer（Including primary coil L2, secondary coil L3）, the second storage capacitor C2,
Seven diode D7, load resistance R12.Wherein the 3rd analog switch is by the 3rd N-type FET and the 4th p-type FET group
Become.Voltage signal on first storage capacitor is input to the input of hysteresis voltage comparator U5, when the electricity on C1 is detected
When pressure is higher than certain value VH, the 3rd analog switch Q3 closure is driven by the output end output control signal of U5, by the first energy storage electricity
Hold the C1 and primary coil L2 of flyback transformer and constitute LC oscillation circuit, by the energy transfer on C1 to L2.When voltage ratio relatively
When the voltage that device U5 detects on C1 is less than certain value VL, the 3rd analog switch Q3 is driven by the output end output control signal of U5
Disconnect, now on the secondary coil L3 of flyback transformer, just have induced-current to occur, by electric energy store on L2 by L3 and
Diode D7 is transferred on the second storage capacitor C2.
Extremum extracting module constitutes sensing and amplitude conditioning module by first resistor R1, second resistance R2, will paste
Voltage signal on second piezoelectric element on vibrational structure surface is processed through amplitude, nurses one's health to first voltage comparator U1's
The in-phase input end of first voltage comparator, first voltage comparator U1 substantially is inputted after the signal allowed band of input
Voltage follower, its output end is connected with reverse input end.The signal of first voltage comparator U1 output is divided into two-way, a road
Directly input the inverting input of tertiary voltage comparator, another road is through 3rd resistor R3, the 4th resistance R4, the 5th resistance
R5, the 6th electric capacity C6 and the low-pass filtering module of second voltage comparator U2 composition, by the output end of second voltage comparator U2
It is connected with the in-phase output end of tertiary voltage comparator, after second voltage comparator U2, the signal of output compares first voltage
The signal of comparator U1 output has a certain degree of delayed phase phenomenon, and this two paths of signals is done ratio by tertiary voltage comparator
Relatively, you can in the control signal of output the first analog switch Q1.Again by the output end of tertiary voltage comparator U3 and the 4th voltage
The reverse input end of comparator U4 is connected, the in-phase input end of the 4th voltage comparator U4 with " " hold and be connected.4th voltage ratio
It is substantially a phase inverter compared with device, its output signal contrary with tertiary voltage comparator U3, for controlling the second simulation to open
Close closure and the disconnection of Q2.
In the present embodiment self-powered circuit module by the alternating voltage on the 3rd piezoelectric element PZT3 through the first diode
D1, the second diode D2 carry out halfwave rectifier, then after the 3rd electric capacity C3, the 5th electric capacity C5 carry out LPF, can be by
Direct current energy is stored on the 4th electric capacity C4.Form forward dc voltage in the anode of the 4th electric capacity C4, the 4th electric capacity C5's
Negative electrode forms negative DC voltage, by above-mentioned two-way DC voltage, the low-power electronic devices in extremum extracting circuit is powered.
Claims (1)
1. a kind of non-linear piezoelectric vibration energy of self-powered extracts circuit it is characterised in that including：
Due to the electric charge of strain generation and it is converted into direct current electricity output for collecting piezoelectric to extraneous load supplying
Nonlinear energy extracts circuit module；
For detecting the electric charge extreme value of piezoelectric material surface, and send control signal to control nonlinear energy to extract the logical of circuit
Disconnected extremum extracting circuit module；
With the power supply electricity powered to low-power electronic devices in nonlinear energy collecting circuit module and extremum extracting circuit module
Road module；
Wherein, described nonlinear energy extracts circuit module and includes the first piezoelectric element, first, second, third analog switch,
Three, the four, the five, the 6th diodes, first, second storage capacitor, threshold value control circuit, inductance and step-up/down conversion
Device, wherein, the first described piezoelectric element first end passes through inductance connection in the 3rd diode cathode and the 5th diode cathode
Between, first piezoelectric element the second end is connected between the 4th diode cathode and the 6th diode cathode；First analog switch
It is made up of the first p-type FET, the colelctor electrode of the first FET is connected with the positive pole of the 5th diode, the 5th diode
Negative pole is connected with the positive pole of the 3rd diode, the emitting stage of the first FET with " " end be connected；Second analog switch is by
Two p-type FET compositions, the colelctor electrode of the second p-type FET is connected with the positive pole of the 6th diode, the 6th diode
Negative pole is connected with the positive pole of the 4th diode, the emitting stage of the second p-type FET with " " end be connected；Described first energy storage electricity
Hold first end be connected with the three, the 4th diode cathodes, first storage capacitor the second end with " " hold be connected；First storage capacitor
First end is connected with the anode of step-up/down converter former limit by the 3rd analog switch, the moon of step-up/down converter former limit
Pole is connected with the second end of the first storage capacitor；The anode of step-up/down converter secondary passes through the 7th diode and the second storage
The anode of energy electric capacity is connected, and the negative electrode of secondary is connected with the negative pole of the second storage capacitor；Described threshold value control circuit detection institute
State the voltage signal on the first storage capacitor, and send drive signal to the 3rd analog switch；
Described extremum extracting circuit module includes the second piezoelectric element, input signal conditioning module, low-pass filtering module and electricity
Pressure comparison module, wherein, input signal conditioning module is followed circuit by first, second resistance and first voltage and is formed, low pass filtered
Ripple module is made up of the 3rd adjustable resistance, the 6th electric capacity and the second operational amplifier, and voltage comparison module is by the three, the 4th computings
Amplifier forms；The voltage signal of the second piezoelectric element after voltage signal magnitude is nursed one's health by described Signal-regulated kinase, then
By this signal through described low-pass filtering module, by original signal with the signal through LPF through described voltage comparison module
It is compared, to first, second analog switch output control signal；
Described self-powered circuit includes the 3rd piezoelectric element, first, second diode and the three, the four, the 5th electric capacity, described
Alternating voltage on 3rd piezoelectric element through first, second diode halfwave rectifier, then through the three, the four, the 5th electric capacity
After LPF, form forward dc voltage in the anode of the 3rd electric capacity, form negative sense direct current in the negative electrode of the 5th electric capacity
Pressure, to circuit power itself.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110266214A (en) * | 2019-06-26 | 2019-09-20 | 南京邮电大学 | A kind of power supply unit based on piezoelectric energy conversion |
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| CN103904781B (en) * | 2014-04-24 | 2016-03-16 | 宁波大学 | A kind of self-powered piezoelectric vibration energy synchronous extraction circuit |
| SG11201707001XA (en) * | 2015-02-26 | 2017-09-28 | Agency Science Tech & Res | A self-powered acceleration sensing device |
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| CN105553330B (en) * | 2015-12-08 | 2017-12-26 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Non-linear piezoelectric energy recovery interface circuit inductor design and method of controlling switch |
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| CN107659205A (en) * | 2017-09-29 | 2018-02-02 | 中国矿业大学 | A kind of piezoelectric energy capture operated type wireless sensing node device for deep tunnel monitoring |
| CN108900113B (en) * | 2018-06-19 | 2019-06-07 | 大连理工大学 | A kind of synchronous charge-extraction of efficiently self-powered piezoelectricity and voltage reverse circuit |
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| CN112099545B (en) * | 2020-09-17 | 2021-07-09 | 青岛大学 | Self-sensing broadband structure vibration and noise control device based on energy recovery |
| CN112510997B (en) * | 2020-11-17 | 2021-11-02 | 华中科技大学 | Hybrid booster circuit for energy collection system and control method |
| CN112857559B (en) * | 2021-01-11 | 2023-02-21 | 宁波大学 | Self-powered wireless vibration monitoring node based on single-piezoelectric device |
| CN113572388A (en) * | 2021-07-30 | 2021-10-29 | 浙江理工大学 | Piezoelectric energy collecting device and control method |
| CN113992058B (en) * | 2021-10-19 | 2024-03-08 | 浙江中控技术股份有限公司 | Self-generating system, apparatus and method for harvesting vibrational energy of rotating equipment |
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| CN101414192B (en) * | 2008-11-10 | 2011-01-19 | 南京航空航天大学 | Structure vibration and noise control device without outside energy supply |
| CN101488033B (en) * | 2008-12-12 | 2010-06-30 | 南京航空航天大学 | Structural vibration and noise control device based on energy recovery |
| CN101561026B (en) * | 2009-05-19 | 2011-01-19 | 南京航空航天大学 | Structural vibration and noise control device based on piezoelectric energy recovery |
| JP2013102639A (en) * | 2011-11-09 | 2013-05-23 | Panasonic Corp | Environment power generation device |
| CN202363945U (en) * | 2011-12-10 | 2012-08-01 | 河南科技大学 | Wireless sensor network node power supply based on vibration mechanical energy |
| CN202906786U (en) * | 2012-11-26 | 2013-04-24 | 西安康弘新材料科技有限公司 | Piezoelectric vibration power generation system |
| CN103036475A (en) * | 2012-11-30 | 2013-04-10 | 南京航空航天大学 | Self-powered vibrational energy extraction circuit based on piezoelectric materials |
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| CN110266214A (en) * | 2019-06-26 | 2019-09-20 | 南京邮电大学 | A kind of power supply unit based on piezoelectric energy conversion |
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